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In liquid medium, M. tuberculosis appears as granular or flaky growth, while most NTM form uniform slight turbidity (except M. kansasii).

 M. tuberculosis forms typical clumps and serpentine cords, while other mycobacteria appear as loose, smaller clumps and cording or single cells. M. kansasii may be difficult to differentiate as it is morphologically closer to M. tuberculosis.

Image
Liquid Flakes of MTB
Image
Serpentine cords of MTB

Resource

Mycobacteriology Laboratory Manual 

  1. Assessment

Question 1

Answer 1

Answer 2

Answer 3

Answer 4

Correct Answer

Correct Explanation

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Part of Post-Test

In a liquid medium, M. tuberculosis appears as granular or flaky growth.

True

False

 

 

True

In a liquid medium, M. tuberculosis appears as granular or flaky growth.

 

Yes

Yes

Question 2

 

 

 

 

 

 

 

 

 

M. tuberculosis forms typical clumps and serpentine cords.

True

False

 

 

True

M. tuberculosis forms typical clumps and serpentine cords.

 

Yes

Yes

 

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